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T83C5121XXX-ICRIL Datasheet(PDF) 5 Page - ATMEL Corporation |
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T83C5121XXX-ICRIL Datasheet(HTML) 5 Page - ATMEL Corporation |
5 / 110 page 5 T8xC5121 4164E–SCR–02/04 P3.0 RxD EVCC I UART function Receive data input I/O Input/Output function P3.0 is a bi-directional I/O port with internal pull-ups. I Reset configuration Input (high level) P3.1 TxD EVCC O UART function Transmit data output OE active at low or high level depending of PMSOEN bits in SIOCON Reg. I/O Input/Output function P3.1 is a bi-directional I/O port with internal pull-ups. Z Reset configuration High impedance due to PMOS switched OFF P3.2 INT0 DVCC I External interrupt 0 INT0 input set IE0 in the TCON register. If bit IT0 in this register is set, bits IE0 are set by a falling edge on INT0. If bit IT0 is cleared, bits IE0 is set by a low level on INT0. I/O Input/Output function P3.2 is a bi-directional I/O port with internal pull-ups. I Timer 0: Gate input INT0 serves as external run control for Timer 0 when selected in TCON register. I Reset configuration Input (high level) P3.3 INT1 OE EVCC I External Interrupt 1 INT1 input set OEIT in ISEL Register, IE1 in the TCON register. If bit IT1 in this register is set, bits OEIT and IE1 are set by a falling edge on INT1. If bit IT1 is cleared, bits OEIT and IE1 is set by a low level on INT1 I UART function Output enable. A low or high level (depending OELEV bit in ISEL Register) on this pin disables the PMOS transistors of TxD (P3.1) and T0 (P3.4). This function can be disabled by software I/O Input/Output function P3.3 is a bi-directional I/O port with internal pull-ups. I Timer 1 function: Gate input INT1 serves as external run control for Timer 1 when selected in TCON register. I Reset configuration Input (high level) P3.4 T0 EVCC O UART function OE active at low or high level depending of PMSOEN bits in SIOCON Reg. Table 1. Ports Description (Continued) Port Signal Name Alternate Internal Power Supply ESD Type Description |
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